Welcome to Astronomy & Telescope Astronomy



· Home
· AvantGo
· Content
· Downloads
· Encyclopedia
· Feedback
· Forums
· Journal
· Members List
· Private Messages
· Recommend Us
· Reviews
· Search
· Statistics
· Stories Archive
· Submit News
· Surveys
· Top 10
· Topics
· Web Links
· Your Account

  Who's Online

There are currently, 12 guest(s) and 0 member(s) that are online.

You are Anonymous user. You can register for free by clicking here




Select Interface Language:


  Random Headlines

[ Astronomy ]


  Moon History: Astronomy: Moon History - A QUIET WORLD
Posted on Saturday, December 04 @ 16:14:34 CST by astronomy
  Moon History


Millions of years passed. The lunar crust cooled, thickened, and stiffened. Collisions continued at a great rate, but because the crust was tougher, impacts began to excavate basins and craters, and to pile up debris around them.

About a billion years after the Moon coalesced, the last few large impacts blasted a handful of basins on the Moon's Earth-facing side. Pools of dark lava floodet the basins, filling them and spilling over to make the face of the Man in the Moon. Although impacts continued to occur, the rate dropped off dramatically.

Finally, the bombardment all but ceased. For the last j three billion years, the Moon has been a fairly quiet place. At present, it is struck only rarely. The crater Copernicus is 800 million years old, and the most recent major impact formed the crater Tycho about 109 million years ago. Compared to Earth, with its constant erosion, mountain building, and volcanic activity, the Moon is a dead world indeed, although unusual events are sometimes reported by skywatchers).




Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

  Related Links

· More about Moon History
· News by astronomy

Most read story about Moon History:
Astronomy: Moon History - LIQUID ROCK


  Article Rating

Average Score: 0
Votes: 0

Please take a second and vote for this article:

Very Good



 Printer Friendly Printer Friendly

 Send to a Friend Send to a Friend


Associated Topics

Moon History

"Login" | Login/Create an Account | 0 comments
The comments are owned by the poster. We aren't responsible for their content.

No Comments Allowed for Anonymous, please register

  Astronomy & Telescope Astronomy

All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest © 2004 by Astronomy & Telescope Astronomy
You can syndicate our news using the file backend.php or ultramode.txt